11
The importance of plankton’s and benthic plant’s study consist in:  knowledge of biological diversity;  ascertainment of plankter’s adaptations on flotation and of pondweeds to the abiotic conditions;  explaining the food web in ecosystem, pointing out feeding behaviours and interactions between predators and their prey and among algae and the herbivores;  determination of wetland’s features and boundaries;  diagnose of the health of the aquatic ecosystem or wetland;

12
Protocol of scientific study global comparison and evaluation of results consulting references and metadata conclusions drawing database realisation statistical analysis of results establishing of a quantitative structure of each association taxonomical analysis of organisms (using identification keys) appreciation of area covered by certain plant/plant association sampling activity (in the field) and realisation of photographs selection of sampling methods establishing of physical and chemical water parameters to be analyzed setting of sample locations and photographic points (points marked by GPS) drawing up of a thorough sketch of the research zone spatial and temporal scale of investigations identification of scientific problems

13
Marking the point with a GPS device Alisma plantago Collecting water for FPK sample